#include "mystdio.h"
#include "mymath.h"
#include <stdio.h>
#include <string.h>
int main(){
  int a=20;
  int b=30;

  printf("%d+%d=%d",a,b,myAdd(a,b));
  myFILE *fp=my_fopen("./myfile.txt", "w");
  
  if(fp==NULL) return 1;
  
  const char* message="hahaha";
  my_fwrite(fp,message,strlen(message));
  my_fclose(fp);
}
